CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net income	$ 30,170	$ 24,153	$ 36,883
Other comprehensive income (loss), net of taxes
Foreign currency translation	(1,725)	(2,190)	4,099
Unrealized gain (loss) on marketable securities (net of applicable taxes of $(5), $48 and $(43), respectively)	(20)	69	(62)
Net change in accumulated other comprehensive income	(1,745)	(2,121)	4,037
Total comprehensive income, net of taxes	$ 28,425	$ 22,032	$ 40,920